WARNING: CASE ONLY The disk of your choice must be placed inside External aluminum case for SATA I, II, and III 3.5" hard drives. USB 3.0 connection (USB3.1 GEN1), backward compatible with USB 2.0. Transfer rate of up to 5.0 Gbps. Compatible with SATA I hard drives of 1.5 Gb/s, SATA II of 3 Gb/s, and SATA III of 6 Gb/s. Supports the UASP protocol which allows high data transfer performance between the hard drive and USB. It is recommended to use a hybrid hard drive for maximum transfer performance. Supported hard drive capacity: over 2 TB on systems that support GPT and up to 2 TB on other systems. Supported mechanical hard drive speeds: 4200RPM / 5400RPM / 7200RPM. Supported format types: FAT32 / NTFS / eXT2 / HFS. Supported operating systems: Windows 2000 / XP / VISTA / Win7 / 8/10, Mac OS 9.X / Mac OS X / macOS, etc. LED indicator to show connection status and hard drive access. Powered through the USB port. Material: aluminum Regulations: CE and RoHS